Company Russ berrie do some amazing gift type products that would look amazing on a cake. I am just doing a search to find something related. I used to buy from them for a catalogue and they have lovely stuff.
A colleague of mine makes cakes and she recently made one with a nursery scene on it - this was made using dolls house nursery furniture and accessories. It was a cradle, baby, highchair complete with mini toys and rug - it looked fantastic. Do you have a posh dolls house shop near you? The selection they have is amazing.